Please post your system info (from MC's help menu). There was a bug fix on this a while back.
Media Center Registered 10.0.155 -- C:\Program Files\J River\Media Center\
Microsoft Windows XP Workstation 5.1 Service Pack 2 (Build 2600)
Intel Unknown 1590 MHz MMX / Memory: Total - 1038 MB, Free - 685 MB
Internet Explorer: 6.0.2900.2180 / ComCtl32.dll: 5.82 (xpsp_sp2_rtm.040803-2158) / Shlwapi.dll: 6.00.2900.2180 (xpsp_sp2_rtm.040803-2158) / Shell32.dll: 6.00.2900.2180 (xpsp_sp2_rtm.040803-2158) / wnaspi32.dll: N/A
Ripping / Drive E: MATSHITAUJDA750FDVD/CDRW Mode:Normal Type:Auto Speed:Max
Digital playback: Yes / Use YADB: Yes / Get cover art: No / Calc replay gain: Yes / Copy volume: 32767
Eject after ripping: Yes / Play sound after ripping: No
Burning / Drive E: MATSHITA UJDA750FDVD/CDRW Addr: 1:0:0 Speed:8 MaxSpeed:8 BurnProof:Yes
Test mode: No / Eject after writing: Yes / Direct decoding: Yes / Write CD-Text: Yes
Use playback settings: No / Normalization: None